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The Largest Number in the World

Googol, googolplex, and why there is no such thing as a "largest number."

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Large Numbers — From Million to Googol

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Frequently Asked Questions

What is the largest number in the world?

Mathematics has no largest number — for any number there is always a bigger one. Among named numbers: googol (10^100) and googolplex (10^googol). Infinity is not a number.

How many zeros does a googol have?

A googol = 10^100 — a one followed by one hundred zeros. The term was coined by the 9-year-old nephew of mathematician Kasner. The search engine Google was named after this number.

Which is bigger — a googol or the number of atoms in the universe?

The number of atoms in the observable universe is approximately 10^80, which is less than a googol (10^100)!